org.argeo.cms.ee/src/org/argeo/cms/integration/CmsExceptionsChain.java

   1 package org.argeo.cms.integration;
   2
   3 import java.io.IOException;
   4 import java.io.Writer;
   5
   6 import javax.servlet.http.HttpServletResponse;
   7
   8 import org.argeo.api.cms.CmsLog;
   9 import org.argeo.cms.util.ExceptionsChain;
  10
  11 import com.fasterxml.jackson.core.JsonGenerator;
  12 import com.fasterxml.jackson.core.JsonProcessingException;
  13 import com.fasterxml.jackson.databind.ObjectMapper;
  14
  15 /** Serialisable wrapper of a {@link Throwable}. */
  16 public class CmsExceptionsChain extends ExceptionsChain {
  17         public final static CmsLog log = CmsLog.getLog(CmsExceptionsChain.class);
  18
  19         public CmsExceptionsChain() {
  20                 super();
  21         }
  22
  23         public CmsExceptionsChain(Throwable exception) {
  24                 super(exception);
  25                 if (log.isDebugEnabled())
  26                         log.error("Exception chain", exception);
  27         }
  28
  29         public String toJsonString(ObjectMapper objectMapper) {
  30                 try {
  31                         return objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(this);
  32                 } catch (JsonProcessingException e) {
  33                         throw new IllegalStateException("Cannot write system exceptions " + toString(), e);
  34                 }
  35         }
  36
  37         public void writeAsJson(ObjectMapper objectMapper, Writer writer) {
  38                 try {
  39                         JsonGenerator jg = objectMapper.writerWithDefaultPrettyPrinter().getFactory().createGenerator(writer);
  40                         jg.writeObject(this);
  41                 } catch (IOException e) {
  42                         throw new IllegalStateException("Cannot write system exceptions " + toString(), e);
  43                 }
  44         }
  45
  46         public void writeAsJson(ObjectMapper objectMapper, HttpServletResponse resp) {
  47                 try {
  48                         resp.setContentType("application/json");
  49                         resp.setStatus(500);
  50                         writeAsJson(objectMapper, resp.getWriter());
  51                 } catch (IOException e) {
  52                         throw new IllegalStateException("Cannot write system exceptions " + toString(), e);
  53                 }
  54         }
  55
  56 //      public static void main(String[] args) throws Exception {
  57 //              try {
  58 //                      try {
  59 //                              try {
  60 //                                      testDeeper();
  61 //                              } catch (Exception e) {
  62 //                                      throw new Exception("Less deep exception", e);
  63 //                              }
  64 //                      } catch (Exception e) {
  65 //                              throw new RuntimeException("Top exception", e);
  66 //                      }
  67 //              } catch (Exception e) {
  68 //                      CmsExceptionsChain systemErrors = new CmsExceptionsChain(e);
  69 //                      ObjectMapper objectMapper = new ObjectMapper();
  70 //                      System.out.println(objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(systemErrors));
  71 //                      System.out.println(objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(e));
  72 //                      e.printStackTrace();
  73 //              }
  74 //      }
  75 //
  76 //      static void testDeeper() throws Exception {
  77 //              throw new IllegalStateException("Deep exception");
  78 //      }
  79
  80 }